2661513305 has 32 divisors (see below), whose sum is σ = 3578065920. Its totient is φ = 1884127680.

The previous prime is 2661513301. The next prime is 2661513373. The reversal of 2661513305 is 5033151662.

It is not a de Polignac number, because 2661513305 - 2² = 2661513301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661513301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 330254 + ... + 338216.

It is an arithmetic number, because the mean of its divisors is an integer number (111814560).

Almost surely, 2^2661513305 is an apocalyptic number.

It is an amenable number.

2661513305 is a deficient number, since it is larger than the sum of its proper divisors (916552615).

2661513305 is a wasteful number, since it uses less digits than its factorization.

2661513305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8141.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 2661513305 is about 51589.8566096088. The cubic root of 2661513305 is about 1385.8286873018.

Adding to 2661513305 its reverse (5033151662), we get a palindrome (7694664967).

The spelling of 2661513305 in words is "two billion, six hundred sixty-one million, five hundred thirteen thousand, three hundred five".